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alistair23-linux/drivers/scsi/hisi_sas/hisi_sas.h
John Garry 0844a3ff00 scsi: hisi_sas: add v2 hw internal abort timeout workaround 
This patch is a workaround for a SoC bug where an internal abort command
may timeout. In v2 hw, the channel should become idle in order to finish
abort process. If the target side has been sending HOLD, host side
channel failed to complete the frame to send, and can not enter the idle
state. Then internal abort command will timeout.

As this issue is only in v2 hw, we deal with it in the hw layer.  Our
workaround solution is: If abort is not finished within a certain period
of time, we will check HOLD status. If HOLD has been sending, we will
send break command.

Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11 22:01:04 -04:00

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8.7 KiB
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/*
* Copyright (c) 2015 Linaro Ltd.
* Copyright (c) 2015 Hisilicon Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#ifndef _HISI_SAS_H_
#define _HISI_SAS_H_
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/dmapool.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <scsi/sas_ata.h>
#include <scsi/libsas.h>
#define DRV_VERSION "v1.6"
#define HISI_SAS_MAX_PHYS 9
#define HISI_SAS_MAX_QUEUES 32
#define HISI_SAS_QUEUE_SLOTS 512
#define HISI_SAS_MAX_ITCT_ENTRIES 2048
#define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES
#define HISI_SAS_RESET_BIT 0
#define HISI_SAS_STATUS_BUF_SZ \
(sizeof(struct hisi_sas_err_record) + 1024)
#define HISI_SAS_COMMAND_TABLE_SZ \
(((sizeof(union hisi_sas_command_table)+3)/4)*4)
#define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
#define HISI_SAS_MAX_SMP_RESP_SZ 1028
#define HISI_SAS_MAX_STP_RESP_SZ 28
#define DEV_IS_EXPANDER(type) \
((type == SAS_EDGE_EXPANDER_DEVICE) || \
(type == SAS_FANOUT_EXPANDER_DEVICE))
struct hisi_hba;
enum {
PORT_TYPE_SAS = (1U << 1),
PORT_TYPE_SATA = (1U << 0),
};
enum dev_status {
HISI_SAS_DEV_NORMAL,
HISI_SAS_DEV_EH,
};
enum {
HISI_SAS_INT_ABT_CMD = 0,
HISI_SAS_INT_ABT_DEV = 1,
};
enum hisi_sas_dev_type {
HISI_SAS_DEV_TYPE_STP = 0,
HISI_SAS_DEV_TYPE_SSP,
HISI_SAS_DEV_TYPE_SATA,
};
struct hisi_sas_phy {
struct hisi_hba *hisi_hba;
struct hisi_sas_port *port;
struct asd_sas_phy sas_phy;
struct sas_identify identify;
struct timer_list timer;
struct work_struct phyup_ws;
u64 port_id; /* from hw */
u64 dev_sas_addr;
u64 phy_type;
u64 frame_rcvd_size;
u8 frame_rcvd[32];
u8 phy_attached;
u8 reserved[3];
enum sas_linkrate minimum_linkrate;
enum sas_linkrate maximum_linkrate;
};
struct hisi_sas_port {
struct asd_sas_port sas_port;
u8 port_attached;
u8 id; /* from hw */
};
struct hisi_sas_cq {
struct hisi_hba *hisi_hba;
struct tasklet_struct tasklet;
int rd_point;
int id;
};
struct hisi_sas_dq {
struct hisi_hba *hisi_hba;
int wr_point;
int id;
};
struct hisi_sas_device {
enum sas_device_type dev_type;
struct hisi_hba *hisi_hba;
struct domain_device *sas_device;
u64 attached_phy;
u64 device_id;
atomic64_t running_req;
struct list_head list;
u8 dev_status;
int sata_idx;
};
struct hisi_sas_slot {
struct list_head entry;
struct sas_task *task;
struct hisi_sas_port *port;
u64 n_elem;
int dlvry_queue;
int dlvry_queue_slot;
int cmplt_queue;
int cmplt_queue_slot;
int idx;
int abort;
void *cmd_hdr;
dma_addr_t cmd_hdr_dma;
void *status_buffer;
dma_addr_t status_buffer_dma;
void *command_table;
dma_addr_t command_table_dma;
struct hisi_sas_sge_page *sge_page;
dma_addr_t sge_page_dma;
struct work_struct abort_slot;
struct timer_list internal_abort_timer;
};
struct hisi_sas_tmf_task {
u8 tmf;
u16 tag_of_task_to_be_managed;
};
struct hisi_sas_hw {
int (*hw_init)(struct hisi_hba *hisi_hba);
void (*setup_itct)(struct hisi_hba *hisi_hba,
struct hisi_sas_device *device);
int (*slot_index_alloc)(struct hisi_hba *hisi_hba, int *slot_idx,
struct domain_device *device);
struct hisi_sas_device *(*alloc_dev)(struct domain_device *device);
void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
int (*get_free_slot)(struct hisi_hba *hisi_hba, u32 dev_id,
int *q, int *s);
void (*start_delivery)(struct hisi_hba *hisi_hba);
int (*prep_ssp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int is_tmf,
struct hisi_sas_tmf_task *tmf);
int (*prep_smp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
int (*prep_stp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
int (*prep_abort)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot,
int device_id, int abort_flag, int tag_to_abort);
int (*slot_complete)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
void (*phys_init)(struct hisi_hba *hisi_hba);
void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no);
void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
void (*phy_set_linkrate)(struct hisi_hba *hisi_hba, int phy_no,
struct sas_phy_linkrates *linkrates);
enum sas_linkrate (*phy_get_max_linkrate)(void);
void (*free_device)(struct hisi_hba *hisi_hba,
struct hisi_sas_device *dev);
int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);
int (*soft_reset)(struct hisi_hba *hisi_hba);
int max_command_entries;
int complete_hdr_size;
};
struct hisi_hba {
/* This must be the first element, used by SHOST_TO_SAS_HA */
struct sas_ha_struct *p;
struct platform_device *pdev;
void __iomem *regs;
struct regmap *ctrl;
u32 ctrl_reset_reg;
u32 ctrl_reset_sts_reg;
u32 ctrl_clock_ena_reg;
u32 refclk_frequency_mhz;
u8 sas_addr[SAS_ADDR_SIZE];
int n_phy;
spinlock_t lock;
struct timer_list timer;
struct workqueue_struct *wq;
int slot_index_count;
unsigned long *slot_index_tags;
unsigned long reject_stp_links_msk;
/* SCSI/SAS glue */
struct sas_ha_struct sha;
struct Scsi_Host *shost;
struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES];
struct hisi_sas_dq dq[HISI_SAS_MAX_QUEUES];
struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];
struct hisi_sas_port port[HISI_SAS_MAX_PHYS];
int queue_count;
struct hisi_sas_slot *slot_prep;
struct dma_pool *sge_page_pool;
struct hisi_sas_device devices[HISI_SAS_MAX_DEVICES];
struct dma_pool *command_table_pool;
struct dma_pool *status_buffer_pool;
struct hisi_sas_cmd_hdr *cmd_hdr[HISI_SAS_MAX_QUEUES];
dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES];
void *complete_hdr[HISI_SAS_MAX_QUEUES];
dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES];
struct hisi_sas_initial_fis *initial_fis;
dma_addr_t initial_fis_dma;
struct hisi_sas_itct *itct;
dma_addr_t itct_dma;
struct hisi_sas_iost *iost;
dma_addr_t iost_dma;
struct hisi_sas_breakpoint *breakpoint;
dma_addr_t breakpoint_dma;
struct hisi_sas_breakpoint *sata_breakpoint;
dma_addr_t sata_breakpoint_dma;
struct hisi_sas_slot *slot_info;
unsigned long flags;
const struct hisi_sas_hw *hw; /* Low level hw interface */
unsigned long sata_dev_bitmap[BITS_TO_LONGS(HISI_SAS_MAX_DEVICES)];
struct work_struct rst_work;
};
/* Generic HW DMA host memory structures */
/* Delivery queue header */
struct hisi_sas_cmd_hdr {
/* dw0 */
__le32 dw0;
/* dw1 */
__le32 dw1;
/* dw2 */
__le32 dw2;
/* dw3 */
__le32 transfer_tags;
/* dw4 */
__le32 data_transfer_len;
/* dw5 */
__le32 first_burst_num;
/* dw6 */
__le32 sg_len;
/* dw7 */
__le32 dw7;
/* dw8-9 */
__le64 cmd_table_addr;
/* dw10-11 */
__le64 sts_buffer_addr;
/* dw12-13 */
__le64 prd_table_addr;
/* dw14-15 */
__le64 dif_prd_table_addr;
};
struct hisi_sas_itct {
__le64 qw0;
__le64 sas_addr;
__le64 qw2;
__le64 qw3;
__le64 qw4_15[12];
};
struct hisi_sas_iost {
__le64 qw0;
__le64 qw1;
__le64 qw2;
__le64 qw3;
};
struct hisi_sas_err_record {
u32 data[4];
};
struct hisi_sas_initial_fis {
struct hisi_sas_err_record err_record;
struct dev_to_host_fis fis;
u32 rsvd[3];
};
struct hisi_sas_breakpoint {
u8 data[128]; /*io128 byte*/
};
struct hisi_sas_sge {
__le64 addr;
__le32 page_ctrl_0;
__le32 page_ctrl_1;
__le32 data_len;
__le32 data_off;
};
struct hisi_sas_command_table_smp {
u8 bytes[44];
};
struct hisi_sas_command_table_stp {
struct host_to_dev_fis command_fis;
u8 dummy[12];
u8 atapi_cdb[ATAPI_CDB_LEN];
};
#define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE
struct hisi_sas_sge_page {
struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
};
struct hisi_sas_command_table_ssp {
struct ssp_frame_hdr hdr;
union {
struct {
struct ssp_command_iu task;
u32 prot[6];
};
struct ssp_tmf_iu ssp_task;
struct xfer_rdy_iu xfer_rdy;
struct ssp_response_iu ssp_res;
} u;
};
union hisi_sas_command_table {
struct hisi_sas_command_table_ssp ssp;
struct hisi_sas_command_table_smp smp;
struct hisi_sas_command_table_stp stp;
};
extern struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port);
extern int hisi_sas_probe(struct platform_device *pdev,
const struct hisi_sas_hw *ops);
extern int hisi_sas_remove(struct platform_device *pdev);
extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
struct sas_task *task,
struct hisi_sas_slot *slot);
extern void hisi_sas_init_mem(struct hisi_hba *hisi_hba);
extern void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
u32 state);
#endif
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